The Nursery-Book: A Complete Guide to the Multiplication and Pollination of PlantsBailey, L. H. (Liberty Hyde)
Science
The Nursery-Book: A Complete Guide to the Multiplication and Pollination of Plants
Bailey, L. H. (Liberty Hyde)
Plant propagation
Cuttings from the nearly mature green-wood are employed for hard-wooded
trees and shrubs, as diervillas (weigela), roses, hydrangeas, lilacs,
etc. They are cut in essentially the same manner as the hard-wood
cuttings described on page 55. They are often taken in summer when the
buds have developed and the wood has about attained its growth. They
are cut to two to four or five buds and are planted an inch or two deep
in shaded frames. They are kept close for some days after setting,
and the tops are sprinkled frequently. Care must be taken not to set
them too deep; they are rarely put in over an inch, if the cutting
is six or seven inches long. "June stock cuttings" are sometimes
advantageously made; here the young shoots of hardy shrubs are taken,
when about two to three inches long, the leaves partly removed, and
they are planted under glass, precisely as the geranium is treated in
the autumn. Several weeks are required for rooting, but good plants are
obtained which, when wintered in a cold-frame, can be planted out in
beds the next spring. Great care must be given to shading and watering.
_Hydrangea paniculata_ var. _grandiflora_, and _Akebia quinata_ are
examples; or any deutzia or more easily handled plant of which stock is
scarce may be cited.
[Illustration: Fig. 54. Cactus cutting held by splinter.]
[Illustration: Fig. 55. Cutting held by toothpick.]
Part of the leaves are removed, as a rule, before the cuttings are set,
as shown in the rose cutting, Fig. 56, and the hydrangea cutting, Fig.
57. This is not essential, however, but it lessens evaporation and the
tendency to "flag" or wilt. In most species the top can be cut off the
cutting, as seen in Figs. 44 and 57, but in other cases it seriously
injures the cutting. Fig. 58 shows a weigela cutting from which the top
was clipped. An unusually large callus formed at the bottom, but the
leaves shrivelled and the cutting is dead. This frequently occurs in
what some nurserymen call "end growers," among which may be mentioned
weigelas (properly diervillas), the shrubby altheas, _Cercis Japonica_,
and such spireas as _S. cratægifolia_, _S. rotundifolia_ var. _alba_
and _S. Cantonensis_ (_S. Reevesii_ of the trade) var. _robusta_.
[Illustration: Fig. 56. Rose cutting.]
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